Financial institutions are not going to disappear, crypto or not. The are an essential, integral part of the current economic system. Retail banking is just a small part of it, financial institutions providing capitals for corporations are much more important, and crypto is of no danger for them.
The banking institution with the entry of Bitcoin currency trading market, had the FEAR of the unknown in some way. the business institution reacted differently with the emerging concern on issue on Banned,Scammer, and the never ending issue on Regulation as to the use of Digital currency into trading market. But, in reality the Banking institution together with the Business community would not allow that the Banking system will be affected by the crypto currency trading market, This is one of the very important part of the government, the banking system, with out it, no country can survive for its the soul of one country economy. it is therefore, that we have to leave with the crypto currency digital transaction, as well as, the banking system.